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<?xml version="1.0"?>
<!DOCTYPE gsdoc PUBLIC "-//GNUstep//DTD gsdoc 1.0.4//EN" "http://www.gnustep.org/gsdoc-1_0_4.dtd">
<gsdoc base="NSValue" up="Base">
<head>
<title>NSValue class reference</title>
<author name="Adam Fedor">
<email address="fedor@boulder.colorado.edu">
fedor@boulder.colorado.edu
</email>
</author>
<author name="Richard Frith-Macdonald">
<email address="rfm@gnu.org">
rfm@gnu.org
</email>
</author>
<copy>
1993, 1994, 1996, 1999 Free Software Foundation, Inc.
</copy>
</head>
<body>
<front><contents /></front>
<chapter>
<heading>
Software documentation for the NSNumber class
</heading>
<class name="NSNumber" super="NSValue" ovadd="1.0.0">
<declared>Foundation/NSValue.h</declared>
<conform>NSCopying</conform>
<conform>NSCoding</conform>
<desc>
Subclass of
<ref type="class" id="NSValue">NSValue</ref>
offering convenience methods for initializing from
and accessing as any C primitive numeric type. On
access, the value will be type-converted if
necessary, using standard C conversion rules.
</desc>
<method type="NSNumber*" factory="yes" ovadd="1.0.0">
<sel>numberWithBool:</sel>
<arg type="BOOL">value</arg>
<desc>
New instance from boolean <var>value</var>.
</desc>
</method>
<method type="NSNumber*" factory="yes" ovadd="1.0.0">
<sel>numberWithChar:</sel>
<arg type="signed char">value</arg>
<desc>
New instance from <strong>signed</strong>
<strong>char</strong> <var>value</var>.
</desc>
</method>
<method type="NSNumber*" factory="yes" ovadd="1.0.0">
<sel>numberWithDouble:</sel>
<arg type="double">value</arg>
<desc>
New instance from <strong>double</strong>
<var>value</var>.
</desc>
</method>
<method type="NSNumber*" factory="yes" ovadd="1.0.0">
<sel>numberWithFloat:</sel>
<arg type="float">value</arg>
<desc>
New instance from <strong>float</strong>
<var>value</var>.
</desc>
</method>
<method type="NSNumber*" factory="yes" ovadd="1.0.0">
<sel>numberWithInt:</sel>
<arg type="signed int">value</arg>
<desc>
New instance from (<strong>signed</strong>)
<strong>int</strong> <var>value</var>.
</desc>
</method>
<method type="NSNumber*" factory="yes" ovadd="10.5.0">
<sel>numberWithInteger:</sel>
<arg type="NSInteger">value</arg>
<desc>
Return a number intialised with NSInteger.
</desc>
</method>
<method type="NSNumber*" factory="yes" ovadd="1.0.0">
<sel>numberWithLong:</sel>
<arg type="signed long">value</arg>
<desc>
New instance from (<strong>signed</strong>)
<strong>long</strong> <var>value</var>.
</desc>
</method>
<method type="NSNumber*" factory="yes" ovadd="1.0.0">
<sel>numberWithLongLong:</sel>
<arg type="signed long long">value</arg>
<desc>
New instance from (<strong>signed</strong>)
<strong>long</strong> <strong>long</strong>
<var>value</var>.
</desc>
</method>
<method type="NSNumber*" factory="yes" ovadd="1.0.0">
<sel>numberWithShort:</sel>
<arg type="signed short">value</arg>
<desc>
New instance from (<strong>signed</strong>)
<strong>short</strong> <var>value</var>.
</desc>
</method>
<method type="NSNumber*" factory="yes" ovadd="1.0.0">
<sel>numberWithUnsignedChar:</sel>
<arg type="unsigned char">value</arg>
<desc>
New instance from <strong>unsigned</strong>
<strong>char</strong> <var>value</var>.
</desc>
</method>
<method type="NSNumber*" factory="yes" ovadd="1.0.0">
<sel>numberWithUnsignedInt:</sel>
<arg type="unsigned int">value</arg>
<desc>
New instance from <strong>unsigned</strong>
<strong>int</strong> <var>value</var>.
</desc>
</method>
<method type="NSNumber*" factory="yes" ovadd="10.5.0">
<sel>numberWithUnsignedInteger:</sel>
<arg type="NSUInteger">value</arg>
<desc>
Return a number intialised with NSUInteger.
</desc>
</method>
<method type="NSNumber*" factory="yes" ovadd="1.0.0">
<sel>numberWithUnsignedLong:</sel>
<arg type="unsigned long">value</arg>
<desc>
New instance from <strong>unsigned</strong>
<strong>long</strong> <var>value</var>.
</desc>
</method>
<method type="NSNumber*" factory="yes" ovadd="1.0.0">
<sel>numberWithUnsignedLongLong:</sel>
<arg type="unsigned long long">value</arg>
<desc>
New instance from <strong>unsigned</strong>
<strong>long</strong> <strong>long</strong>
<var>value</var>.
</desc>
</method>
<method type="NSNumber*" factory="yes" ovadd="1.0.0">
<sel>numberWithUnsignedShort:</sel>
<arg type="unsigned short">value</arg>
<desc>
New instance from <strong>unsigned</strong>
<strong>short</strong> <var>value</var>.
</desc>
</method>
<method type="BOOL" ovadd="1.0.0">
<sel>boolValue</sel>
<desc>
Return value as a BOOL; this will in fact be a
<strong>char</strong> value converted if necessary
from type initialized with; if you wish to consider
anything nonzero TRUE do not compare directly to
<code>YES</code>, but use <code>'!= NO'</code>.
</desc>
</method>
<method type="signed char" ovadd="1.0.0">
<sel>charValue</sel>
<desc>
Returns value as a <strong>signed</strong>
<strong>char</strong>, converting if necessary.
</desc>
</method>
<method type="NSComparisonResult" ovadd="1.0.0">
<sel>compare:</sel>
<arg type="NSNumber*">otherNumber</arg>
<desc>
Compares receiver with <var>otherNumber</var>,
using C type conversion if necessary, and returns
<code>NSOrderedAscending</code>,
<code>NSOrderedDescending</code>, or
<code>NSOrderedSame</code> depending on whether it
is less than, greater than, or equal to
<var>otherNumber</var>.
</desc>
</method>
<method type="NSString*" ovadd="1.0.0">
<sel>description</sel>
<desc>
Returns the string representation of this number
using a non-localised conversion (decimal point is
'.' irrespective of the locale).
</desc>
</method>
<method type="NSString*" ovadd="1.0.0">
<sel>descriptionWithLocale:</sel>
<arg type="id">locale</arg>
<desc>
<p>
Produces a string representation of the number.
For a boolean this will be either 'true' or 'false'.
For other numbers the format is produced using the
initWithFormat:locale:...
method of NSString, and the format depends on the
type of number as follows -
</p>
<deflist>
<term><strong>char</strong></term> <desc>%i</desc>
<term><strong>short</strong></term>
<desc>%hi</desc> <term><strong>int</strong></term>
<desc>%i</desc> <term><strong>long</strong></term>
<desc>%li</desc>
<term>
<strong>long</strong> <strong>long</strong>
</term>
<desc>%lli</desc>
<term>
<strong>unsigned</strong>
<strong>char</strong>
</term>
<desc>%u</desc>
<term>
<strong>unsigned</strong>
<strong>short</strong>
</term>
<desc>%hu</desc>
<term>
<strong>unsigned</strong> <strong>int</strong>
</term>
<desc>%u</desc>
<term>
<strong>unsigned</strong>
<strong>long</strong>
</term>
<desc>%lu</desc>
<term>
<strong>unsigned</strong>
<strong>long</strong> <strong>long</strong>
</term>
<desc>%llu</desc>
<term><strong>float</strong></term>
<desc>%0.7g</desc>
<term><strong>double</strong></term>
<desc>%0.16g</desc>
</deflist>
</desc>
</method>
<method type="double" ovadd="1.0.0">
<sel>doubleValue</sel>
<desc>
Returns value as a <strong>double</strong>,
converting if necessary.
</desc>
</method>
<method type="float" ovadd="1.0.0">
<sel>floatValue</sel>
<desc>
Returns value as a <strong>float</strong>,
converting if necessary.
</desc>
</method>
<method type="id" ovadd="1.0.0">
<sel>initWithBool:</sel>
<arg type="BOOL">value</arg>
<desc>
Initialize from boolean <var>value</var>.
</desc>
</method>
<method type="id" ovadd="1.0.0">
<sel>initWithChar:</sel>
<arg type="signed char">value</arg>
<desc>
Initialize from <strong>signed</strong>
<strong>char</strong> <var>value</var>.
</desc>
</method>
<method type="id" ovadd="1.0.0">
<sel>initWithDouble:</sel>
<arg type="double">value</arg>
<desc>
Initialize from <strong>double</strong>
<var>value</var>.
</desc>
</method>
<method type="id" ovadd="1.0.0">
<sel>initWithFloat:</sel>
<arg type="float">value</arg>
<desc>
Initialize from <strong>float</strong>
<var>value</var>.
</desc>
</method>
<method type="id" ovadd="1.0.0">
<sel>initWithInt:</sel>
<arg type="signed int">value</arg>
<desc>
Initialize from (<strong>signed</strong>)
<strong>int</strong> <var>value</var>.
</desc>
</method>
<method type="id" ovadd="10.5.0">
<sel>initWithInteger:</sel>
<arg type="NSInteger">value</arg>
<desc>
Initialise the receiver with NSInteger content.
</desc>
</method>
<method type="id" ovadd="1.0.0">
<sel>initWithLong:</sel>
<arg type="signed long">value</arg>
<desc>
Initialize from (<strong>signed</strong>)
<strong>long</strong> <var>value</var>.
</desc>
</method>
<method type="id" ovadd="1.0.0">
<sel>initWithLongLong:</sel>
<arg type="signed long long">value</arg>
<desc>
Initialize from (<strong>signed</strong>)
<strong>long</strong> <strong>long</strong>
<var>value</var>.
</desc>
</method>
<method type="id" ovadd="1.0.0">
<sel>initWithShort:</sel>
<arg type="signed short">value</arg>
<desc>
Initialize from (<strong>signed</strong>)
<strong>short</strong> <var>value</var>.
</desc>
</method>
<method type="id" ovadd="1.0.0">
<sel>initWithUnsignedChar:</sel>
<arg type="unsigned char">value</arg>
<desc>
Initialize from <strong>unsigned</strong>
<strong>char</strong> <var>value</var>.
</desc>
</method>
<method type="id" ovadd="1.0.0">
<sel>initWithUnsignedInt:</sel>
<arg type="unsigned int">value</arg>
<desc>
Initialize from <strong>unsigned</strong>
<strong>int</strong> <var>value</var>.
</desc>
</method>
<method type="id" ovadd="10.5.0">
<sel>initWithUnsignedInteger:</sel>
<arg type="NSUInteger">value</arg>
<desc>
Initialise the receiver with NSUInteger content.
</desc>
</method>
<method type="id" ovadd="1.0.0">
<sel>initWithUnsignedLong:</sel>
<arg type="unsigned long">value</arg>
<desc>
Initialize from <strong>unsigned</strong>
<strong>long</strong> <var>value</var>.
</desc>
</method>
<method type="id" ovadd="1.0.0">
<sel>initWithUnsignedLongLong:</sel>
<arg type="unsigned long long">value</arg>
<desc>
Initialize from <strong>unsigned</strong>
<strong>long</strong> <strong>long</strong>
<var>value</var>.
</desc>
</method>
<method type="id" ovadd="1.0.0">
<sel>initWithUnsignedShort:</sel>
<arg type="unsigned short">value</arg>
<desc>
Initialize from <strong>unsigned</strong>
<strong>short</strong> <var>value</var>.
</desc>
</method>
<method type="signed int" ovadd="1.0.0">
<sel>intValue</sel>
<desc>
Returns value as a (<strong>signed</strong>)
<strong>int</strong>, converting if necessary.
</desc>
</method>
<method type="NSInteger" ovadd="10.5.0">
<sel>integerValue</sel>
<desc>
Return the contents of the receiver as NSInteger.
</desc>
</method>
<method type="BOOL" ovadd="1.0.0">
<sel>isEqualToNumber:</sel>
<arg type="NSNumber*">otherNumber</arg>
<desc>
Returns whether receiver and <var>otherNumber</var>
represent the same numerical value.
</desc>
</method>
<method type="signed long long" ovadd="1.0.0">
<sel>longLongValue</sel>
<desc>
Returns value as a (<strong>signed</strong>)
<strong>long</strong> <strong>long</strong>,
converting if necessary.
</desc>
</method>
<method type="signed long" ovadd="1.0.0">
<sel>longValue</sel>
<desc>
Returns value as a (<strong>signed</strong>)
<strong>long</strong>, converting if necessary.
</desc>
</method>
<method type="signed short" ovadd="1.0.0">
<sel>shortValue</sel>
<desc>
Returns value as a (<strong>signed</strong>)
<strong>short</strong>, converting if necessary.
</desc>
</method>
<method type="NSString*" ovadd="1.0.0">
<sel>stringValue</sel>
<desc>
Returns
<ref type="method" id="-description">
-description
</ref>
.
</desc>
</method>
<method type="unsigned char" ovadd="1.0.0">
<sel>unsignedCharValue</sel>
<desc>
Returns value as an <strong>unsigned</strong>
<strong>char</strong>, converting if necessary.
</desc>
</method>
<method type="unsigned int" ovadd="1.0.0">
<sel>unsignedIntValue</sel>
<desc>
Returns value as an <strong>unsigned</strong>
<strong>int</strong>, converting if necessary.
</desc>
</method>
<method type="NSUInteger" ovadd="10.5.0">
<sel>unsignedIntegerValue</sel>
<desc>
Return the contents of the receiver as NSUInteger.
</desc>
</method>
<method type="unsigned long long" ovadd="1.0.0">
<sel>unsignedLongLongValue</sel>
<desc>
Returns value as an <strong>unsigned</strong>
<strong>long</strong> <strong>long</strong>,
converting if necessary.
</desc>
</method>
<method type="unsigned long" ovadd="1.0.0">
<sel>unsignedLongValue</sel>
<desc>
Returns value as an <strong>unsigned</strong>
<strong>long</strong>, converting if necessary.
</desc>
</method>
<method type="unsigned short" ovadd="1.0.0">
<sel>unsignedShortValue</sel>
<desc>
Returns value as an <strong>unsigned</strong>
<strong>short</strong>, converting if necessary.
</desc>
</method>
</class>
</chapter>
<chapter>
<heading>
Software documentation for the NSValue class
</heading>
<class name="NSValue" super="NSObject" ovadd="1.0.0">
<declared>Foundation/NSValue.h</declared>
<conform>NSCopying</conform>
<conform>NSCoding</conform>
<desc>
The <code>NSValue</code> class can wrap a single
primitive value as an object so it can be used in
the containers and other places where an object reference
is needed. Once initialized, an <code>NSValue</code> is
immutable, and there is no
<code>NSMutableValue</code> class. You initialize it
by giving it a pointer to the primitive value, and you
should be careful this does not get freed until after
the <code>NSValue</code> is no longer used.
</desc>
<method type="NSValue*" factory="yes" ovadd="1.0.0">
<sel>value:</sel>
<arg type="const void*">value</arg>
<sel>withObjCType:</sel>
<arg type="const char*">type</arg>
<desc>
Create new instance with specified <var>value</var>
(a pointer) of given <var>type</var>, which is a string
code obtainable through the compile-time operator
<code>@encode(...)</code>. For example:
<example>
NSValue *theValue = [NSValue value: &n withObjCType: @encode(int)];
</example>
</desc>
</method>
<method type="NSValue*" factory="yes" ovadd="10.0.0">
<sel>valueWithBytes:</sel>
<arg type="const void*">value</arg>
<sel>objCType:</sel>
<arg type="const char*">type</arg>
<desc>
Synonym for value:withObjCType:.
</desc>
</method>
<method type="NSValue*" factory="yes" ovadd="1.0.0">
<sel>valueWithNonretainedObject:</sel>
<arg type="id">anObject</arg>
<desc>
Create new instance holding <var>anObject</var>.
This is useful if you want to add <var>anObject</var>
to a collection such as
<ref type="class" id="NSArray">NSArray</ref>
but don't want it to be retained (a weak reference).
</desc>
</method>
<method type="NSValue*" factory="yes" ovadd="1.0.0">
<sel>valueWithPoint:</sel>
<arg type="NSPoint">point</arg>
<desc>
Convenience method to create instance holding
an <code>NSPoint</code> structure.
</desc>
</method>
<method type="NSValue*" factory="yes" ovadd="1.0.0">
<sel>valueWithPointer:</sel>
<arg type="const void*">pointer</arg>
<desc>
Convenience method to create instance holding a
<var>pointer</var>. Same as using
<code>@encode(<strong>void</strong> *)</code> in
<ref type="method" id="+value:withObjCType:">
+value:withObjCType:
</ref>
.
</desc>
</method>
<method type="NSValue*" factory="yes" ovadd="1.0.0">
<sel>valueWithRange:</sel>
<arg type="NSRange">range</arg>
<desc>
Convenience method to create instance holding
an <code>NSRange</code> structure.
</desc>
</method>
<method type="NSValue*" factory="yes" ovadd="1.0.0">
<sel>valueWithRect:</sel>
<arg type="NSRect">rect</arg>
<desc>
Convenience method to create instance holding
an <code>NSRect</code> structure.
</desc>
</method>
<method type="NSValue*" factory="yes" ovadd="1.0.0">
<sel>valueWithSize:</sel>
<arg type="NSSize">size</arg>
<desc>
Convenience method to create instance holding
an <code>NSSize</code> structure.
</desc>
</method>
<method type="void" ovadd="1.0.0">
<sel>getValue:</sel>
<arg type="void*">value</arg>
<desc>
Copies bytes from the pointer receiver was
initialized with into buffer pointed to by
<var>value</var>. Number of bytes copied is
determined by the type. If type was a
<strong>void</strong> * pointer or object
<strong>id</strong>, the memory address itself is
copied.
</desc>
</method>
<method type="id" init="yes" ovadd="10.0.0">
<sel>initWithBytes:</sel>
<arg type="const void*">data</arg>
<sel>objCType:</sel>
<arg type="const char*">type</arg>
<desc>
Initialize with value of <var>type</var>,
parallel to value:withObjCType:.
</desc>
</method>
<method type="BOOL" ovadd="10.0.0">
<sel>isEqualToValue:</sel>
<arg type="NSValue*">other</arg>
<desc>
Compares this instance to another
<code>NSValue</code>. For equality, both contents
and declared type of the two values must match.
</desc>
</method>
<method type="id" ovadd="1.0.0">
<sel>nonretainedObjectValue</sel>
<desc>
If receiver was initialized with an object ID, return
it, else raises
<code>NSInternalInconsistencyException</code>.
</desc>
</method>
<method type="const char*" ovadd="1.0.0">
<sel>objCType</sel>
<desc>
Returns the string <code>@encode(...)</code>
compatible type the receiver was initialized
with.
</desc>
</method>
<method type="NSPoint" ovadd="1.0.0">
<sel>pointValue</sel>
<desc>
If receiver was initialized with an <code>NSPoint</code>
value, return it, else raises
<code>NSInternalInconsistencyException</code>.
</desc>
</method>
<method type="void*" ovadd="1.0.0">
<sel>pointerValue</sel>
<desc>
If receiver was initialized with a <strong>void</strong>
* pointer, return it, else raises
<code>NSInternalInconsistencyException</code>.
</desc>
</method>
<method type="NSRange" ovadd="1.0.0">
<sel>rangeValue</sel>
<desc>
If receiver was initialized with an <code>NSRange</code>
value, return it, else raises
<code>NSInternalInconsistencyException</code>.
</desc>
</method>
<method type="NSRect" ovadd="1.0.0">
<sel>rectValue</sel>
<desc>
If receiver was initialized with an <code>NSRect</code>
value, return it, else raises
<code>NSInternalInconsistencyException</code>.
</desc>
</method>
<method type="NSSize" ovadd="1.0.0">
<sel>sizeValue</sel>
<desc>
If receiver was initialized with an <code>NSSize</code>
value, return it, else raises
<code>NSInternalInconsistencyException</code>.
</desc>
</method>
</class>
</chapter>
<chapter>
<heading>
Software documentation for the NSValue(Subclassing)
category
</heading>
<category name="Subclassing" class="NSValue" ovadd="0.0.0" ovrem="0.0.0">
<declared>Foundation/NSValue.h</declared>
<desc>
Note: Defines a method that is not in the OpenStep
spec, but makes subclassing easier.
</desc>
<method type="Class" factory="yes" ovadd="0.0.0" ovrem="0.0.0">
<sel>valueClassWithObjCType:</sel>
<arg type="const char*">type</arg>
<desc>
Used by value: withObjCType: to determine the concrete
subclass to alloc.
</desc>
</method>
</category>
</chapter>
</body>
</gsdoc>
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